TRU SPEC Prefab Single 8" Subwoofer Enclosure Sundown SA - GP Car Audio
JBL Arena 8 Arena Series 8" component subwoofer with 2- or 4-ohm selectable impedance at Crutchfield
BAS8 - 8" 400 Watts RMS Class D Powered Subwoofer in Ported Enclosure,
Amazon.com: MB Quart DS1-204 Discus Shallow Mount Subwoofer (Black) – 8 Inch Subwoofer, 400 Watt, Car Audio, 2 Inch Voice Coils, UV Rubber Surround, Best in Sealed Enclosures : Electronics